Spool or bobbin



Nov. 18, 1930. L. c. BALDWIN 1,781,301

' SPOOL OR 808818 1' Filed Sept. 15, 1927 2 Sheets-Sheet 1 I jailer:@2507 1 Luz/w BQMZUiZ NOV? 13, 9- V L. c. BALDWIN 1,781,801

SPOOL OR BOBBIN Filed Sept. 15, 1927 2 Shoots-Sheet 2 Z .6 4Z5 ".9 I /'dPatented Nov. 1 8, 1930 UNITED STATES PATENT OFFICE LUTHER CHASEBALDWIN, OF PROVIDENCE, RHODE ISLAND, 'ASSIGNOIR, BY MESNE ASSIGNMENTS,TO U. S. BOBBIN & SHUTTLE COMPANY, 1929, OF PROVIDENCE, RHODE ISLAND, ACORPORATION OF RHODE ISLAND SPOOL OR BOBBIN Application filed September15, 1927. Serial No. 219,621..

6 barrel and head of the spool or bobbin are independent, the inventionrelating more particularly to means for securing the head of the spoolin assembled relation to its barrel and to a process of making suchspools or bobbins.

While a wooden barrel is desirable in spools of this character, onaccount of its light weight and relative cheapness, the fiber head has,to a large extent, displaced the older wooden head by reason of itsgreater strength, freedom from splitting, nicking or warping, and onaccount of its smooth surface which will not abrade fine and delicateyarns. 'hile the fiber head is desirable, its inherent characteristics,and particularly its hardness and usual lack of thickness in an axialdirection, makes it difiicult to secure it firmly to the wooden barreland particularly so that it will not turn relatively to the barrel, suchrelative movement, if permitted, resulting in rapid wear and consequentloosening of the parts and in snarling the yarn or pinching it in thecrevice which soon appears between the head and the barrel.

In accordance with the present invention I provide simple, cheap,effective and re-' liable means for holding the spool head in fixedassembled relation to the barrel, the completed spool having a smoothand finished surface free frormproj'ections or other elements whichmight catch in, or injure the yarn and I have devised a simple andpractical method of making this improved spool or bobbin.

.In the accompanying drawings I have illustrated a preferred embodimentof the invention, together with certain of the steps employed inpreparing it and I have also illustrated certain desirable modificationsof the preferred construction.

In the drawings Fig. 1 is a side elevation of a completed spool orbobbin embodying my invention; Fig. 2 is a fragmentary end elevation, to

larger scale, of the completed spool as shown in Fig. 1;

Fig. 3 is a fragmentary elevation, partly in radial section,illustrating details of the barrel of the spool;

Fig. i is a radial section illustrating a. plug or bushing employed forholding the barrel and head in assembled relation;

Fig. 5 is an end elevation of the head of the spool;

Fig. 6 is a fragmentary edge elevation of the head, to larger scale,and-partly in section on line 66 of Fig. 5;

Fig. 7 is a fragmentary side elevation, partly in section, on line 7-7of Fig. 2, show ing the completed spool;

ig. 8 is a fragmentary section similar to Fig. 6 but showing a modifiedconstruction of head;

Figs. 9, 10 and 11 are views similar to Fig.

8 but showing further modifications;

Fig. 12 is a fragmentary end elevation of a completed spool having ahead of the type illustrated in Fig. 9; and

Fig.13 is a cross-sectional view similar to Fig. 7 but showing amodified form of the invention.

Referring to the drawings, the spool comprises a barrel 1 having heads 2attached to itsfopposite ends. Although I herein refer to this barrel asbeing made of wood, which is a common, cheap and desirable material forthe purpose, I contemplate that other materials having the propercharacteristics'may be employed, such for example, as artificial wood,paper, paper board or metal, and when I refer to wood as the substanceof the barrel I wish this to be understood as illustrative only and notas restrictive of the invention.

The barrel 1 is preferably tubular, having an axial bore 3. Inaccordance wi h the present invention I prefer to make this'bore 3 oflarger diameter than that necessary to receive the spindle or othersupporting means with which the spool is intended to cooperate.

I prefer to provideat each end of the barrel a part 4 of reduceddiameter as compared with the body of the barrel, the reduced portion 4extending inwardly from the end 5 of.

able material and of the necessary thickness to provide the strengthrequisite for the particular use to which the spool is to be put. I haveherein referred to this head as being made of hard fiber which iscommonly employed for the purpose but I contemplate that other materialsmay be substituted among which may be mentioned hard rubber, variousphenol condensation products, cellulose derivatives, and the like, aswell as wood, and while I have referred to fiber as the substance whichI use'in making the head, I wish it to be understood that this term isused merely by way of example and not as restrictive of the invention.

The head 2 may be stamped or died from sheet material of suitablethickness and may have its outer edges smoothed and rounded and itsfaces finished if necessary before assembling with the barrel. The head2 is provided with a central aperture 7 and preferably, though notnecessarily, this aperture tapers in diameter from the outer surface 8of the head toward the inner surface 9 of the latter. Preferably thesmaller diameter of the aperture 7 is adapted to receive the reduced endportion 4 of the barrel with a fairly snug fit although an accurate orclose fit is not necessary.

The wall of the aperture 7 is provided with one or more recesses 10.While I contemplate that a single recess may serve the purpose I preferto emplo a plurality of such recesses spaced circum erentially asubstantial distance apart and preferably I arrange these recessessymmetrically. As here shown, I provide six such recesses, although, asabove stated, the exact number is immaterial.

These recesses may be formed in any desired manner as, for example, bythe use of a file, saw, grinding wheel or other implements, and as shownin Fig. 6 these recesses extend from the outer surface 8 of the headpart way across the thickness of the head, the recesses tapering inwidth and depth and being of substantially triangular cross section.Such spaced recesses as I have described may be formed much more readilythan teeth or projections jutting out from the wall of the aperturesince the formation of such teeth or projections necessitates a moldingor similar manipulation of the fiber head during its process ofmanufacture or the cutting away of a very substantial .portion of theintervening material.

Having provided a barrel andhead as described, I-now also provide a plugor bushing 11 as shown-in Fig. 4. This plug 11 preferably comprises acylindrical body portion 12 adapted to fit snugly within the bore 3 ofthe barrel and a head or wedge portion which flares outwardly from thebody 12, this wedge portion13 preferably terminating in a smoothlyrounded outer end surface 14 adapted to give a desirable finish to thecompleted spool. Preferably this plug or bushing 11 is provided with anaxial bore 15 of a suitable diameter to fit over the spindle or othersupport upon which the spool is intended to be mounted.

In assembling the parts thus described, I. place the head 2 over thereduced end portion of the barrel, causing the inner face 9 of the headto bear against the shoulder 6. I then insert the plug or bushing 11 inthe bore?) of the barrel, preferably first coating the outer surfaces ofthe plug with a suitable adhesive, for example, hot glue. Thecylindrical body 12 of the plug is inserted in the bore 3 and then theplug is driven forcibly inward so that its flaring wedge portion 13expands the material at the end of the barrel, (consituting the reducedportion 4 thereof,) into firm contact with the inner Wall of theaperture 7 in the head, as shown in Fig. 7. In this figure the expandedand outwardly flaring portion of the barrel is indicated at 4*. In thusforcibly expanding the portion 4 of the barrel, its substance is causedto protrude into the recesses 10, as indicated at 4 in Figs. 2 and 7 Theengagement of these integral portions of the material of the barrel withthe recesses in the head provides positive means for preventing relativerotation of the head and barrel. At the same time the adhesive unitingthe plug 11 to the barrel binds all of the parts together so that it isthereafter impossible to separate them, except by breakage, the headbeing firmly retained between the shoulder 6 of the barrel and theoverlapping flaring portion 4 of the barrel.

While I have referred to the use of adhesive in securing the plug 11 inposition, I wish it to be understood that other fastening means might beemployed -if desired and when in the claims I have referred to fasteningmeans I wish this term to be construed broadly and not as necessarilylimitedto glue or other adhesive.

While the type of recess above described is desirable and easy to make,I contemplate that other types of recess may be found useful anddesirable under certain conditions. For example, in Fig. 8 I haveindicated the head 2 as provided with the aperture 7 a and in th sarrangement I show substantially straight recesses or grooves 10 ofuniform width extending from the outer surface of the head across to itsinner surface. Such recesses may be spaced apart in the same way as therecesses 10 above referred to and may he made by the use of any suitableimplements or in any desired manner.

InFig. 9 I illustrate an arrangement'of recesses of somewhatdiflerentcharacter, the head 2 having the central aperture 7* and therecesses 10 in the wall of this aperture. In this instance the recesses'10 extend from the inner face 9 of the headtoward its outer face 8 butterminate before they reach the outer face. Thus, the edge 16 of theaperture 7 at the outerfac'e 8" of the head is smooth and u'nnotched;The recesses 10? may be of triangular section'or of such other form asmay be desired.

In Fig. 10 I have shown a further modi fication in which the head 2 isprovided with the central aperture -7 and with a series of recesses 10'in the wall of the aperture.

, of substantially circular 'or' semi-spherical recesses 10 When headsof thetypes-shown in Figs. 9, 10 or 11 are assembled with the barrel andsecured in position by means of the plug or bushing, as above describedwith respect to Figs. 1 to 7, the reduced port on 4 of the barrel isexpanded and flared outwardly in the same way as indicated in Fig. 7 toprovide a ring-like portion 4 which appears at the end of the spool,butas shown in Fig. 12

those portions of the material of the barrel which are forced outwardlyinto the recesses in the head do not show from the exterior so that inthe completed spool these retaining elements are not apparent. Thearrangements shown in Figs. 9, 10 and 11 are intended merely as examplesof structures in which the retaining elements are concealed in thecompleted spool and obviously other shapes of recess than thoseillustrated could be employed for the purpose, and I regard all suchshapes as within the scope of the invention.

Fig. 13 illustrates another form of the invention, in which the materialof the plug 111 is pressed directly into engagement with the annularhead 102. As in other forms of the invention. the head may have acentral aper ture which is tapered from the outer surface 108 of thehead toward its inner surface 109, and the wall of the aperture may havea plurality of recesses 110. In the form of the invention disclosedinFig. 13 the material of the bushing 111 is forced into directengagement with the tapered wall of the head tive of the invention butmerely as suggese tive of further possibilities in the way ofmodificationof the structure which I have herein claimed broadly and Iwish it to be understood that further changes in shape, size, relativeproportions and arrangement ofparts, and materials used may be made ascircumstances may warrant and within the scope of the appended claims.

Iclaim:

Y 1. A spool or bobbin comprisin av tubular barreland a headindependentt ereof, the head having a central aperture receiving the end portion ofthe barrel, the wall of said aperture having circumferentially spacedrecesses and the barrel having integral projec tions engaging saidrecesses whereby posi-' tively to prevent relative rotation of the headand the barrel, said recesses being spaced from the outer surface of thehead and tapering in width, being widest adjacent to said inner face ofthe head.

2. A spool or bobbin comprising a wooden barrel and a hard fiber head,the head having a central aperture receiving the end portion of thebarrel, the wall of said aperture having circumfe'rentially spacedrecesses and the barrelhaving integral projections engaging saidrecesses whereby positively to prevent relative rotation of the head andbarrel, said recesses and projections being wholly concealed from viewin the completed spool.

3. A spool or bobbin comprising a barrel and a head independent thereof,the head havinga central aperture receiving the end portion of thebarrel, the wallof said aperture having circumferentially spacedrecesses and the barrel having integral projections engaging saidrecesses whereby positivel to prevent relative rotation of the'head andarrel, the recesses tapering in width and being widest adjacent to theinner face of the head and terminating at a point spaced from the outerface of the head, said recesses and projections being wholly concealedfrom view in the completed spool.

4:. A spool or bobbin having a tubular barrel and a head independent ofthe barrel, said head having a central aperture provided with a recessin its wall, the recess being spaced from the outer surface of the head,the barrel comprising an end portion of reduced diameter dis osed withinsaid aperture, said end portion aving a projection entering said recess.and a bushing disposed within the end of the barrel, said bushingholding said end portion of the barrel in firm engagement with the head.I I

5. A textile spool or bobbin having a tubular wooden barrel and a hardfiber head, said head having a central aperture provided with widelyspaced recesses in its wall, said recesses being spaced from the outersurface of the head and being of substantially triangular cross section,the barrel having an end portion disposed within the aperture within thehead, and a wooden plug disposed within the barrel and secured theretobymeans of adhesive, said plug having a tapered portion forciblyinserted in the end portion of the barrel soas to embed the material ofthe barrel in the spaced recesses in the head, thereby to preventrelative rotation of the head and the barrel.

6. A spool or'bobbin comprising a barrel having an axial bore, a headindependent of the barrel, said head having a central aperture providedwith spaced recesses in its walls, said recesses being spaced from theouter face of the head, the barrel having an end portion disposed withinthe aperture in the head, a plug having a body portion fitting into andfixed within the bore in the barrel and having a tapered head acting asa wedge to hold the endportion of the barrel in firm engagement with thewall of the aperture in the head and to force portions of the materialof the barrel into said recesses.

7. A spool or bobbin having a tubular wooden barrel and a hard fiberhead, the head having a. central aperture which tapers from, its outersurface inwardly and which has recesses in its wall, the barrelcomprising an end portion of reduced diameter providing a shoulder foren agement with the inner surface of the head said reduced end portionbeing disposed within the aperture of the head and flaring outwardlyinto contact with I the wall of the aperture, portions of the materialof the barrel entering the recesses in said wall to prevent relativerotation of the barrel and head, said portions being concealed from viewin the completed spool, a bushing disposed within the end of the barrel,said bushing having a tapered part engaging the flaring end portion ofthe barrel, and means fixedly securing the bushing within the barrel. Y

8. That method of making spools or bobbins which comprises as stepspreparing a barrel having an axial bore and'an end ortion of reduceddiameter terminating in a radial shoulder, preparing a head having acentral aperture adapted to fit over the reduced end portion of thebarrel, said aper ture tapering in diameter from the outer toward theinner face of the head and having a plurality of circumferentiallyspaced re-' cesses in its wall, said recesses being spaced from theouter surface of the head, preparing a plug having a body portionadapted to fit snugly within the bore in the barrel and a flaring wedgeportion, pushing the reduced end portion of the barrel into the aperturein the head until the shoulder engages the inner face of the head, anddriving the plug into the bore in the barrel until its flaring wedgeportion expands the end of the barrel outwardly into contact with thetapering wall of the aperture in the head and causes the material of theend portion of the barrel to protrude into said recesses.

9. That method of making spools or bobbins which comprises as stepspreparing a wooden barrel having an axial bore and an end portion ofreduced diameter terminating snugly into the bore inthe barrel and anoutwardly flaring wedge-like end portion, pushing the reduced endportionof the barrel into the aperture in the head until the shoulderengages the inner face of the head, applying adhesive to the outersurfaces of the plug, and driving the plug into the bore in the barreluntil its flaring wedge portion expands the end portion of the barreloutwardly into close contact with the tapering wall of the aperture inthe head and causes the material of theend portion of the barrel toproject into said recesses.

Signed by me at Providence, Rhode Island, this thirteenth day ofSeptember, 1927.

LUTHER CHASE BALDWIN.

